Using different templates for several instances of a single ContentType

I am currently facing a problem concerning the way to display content items, and I need some help. Let me explain :

I made the choice of using a single ContentType to manage about everything on my Orchard website (news, static pages such as "about" page, "customers" page etc...). Let's call this ContentType
MyType.

I created several lists that contain items of the MyType ContentType.

Although all my items are of the same type, I would like to display some
items differently. For example, my news list should not look like any other list on my website, although they contain objects of the same type (so the Summary view should be different I guess).

I'm wondering why you've decided to represent everything with the same content type. The whole point of being able to create different content types is to get around exactly the problems you're describing. Maybe you just need to approach it that way?